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| author | Alexander Duyck <aduyck@mirantis.com> | 2016-05-18 10:44:47 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-05-20 19:25:52 -0400 |
| commit | 6a5536810180bb2c739df890a36cfa29da1914eb (patch) | |
| tree | 5c66ca79e655ffab486f9c82a73980585996f565 | |
| parent | 9a0351dfca14b44443a98c0cafe4de234d1ba469 (diff) | |
| download | linux-6a5536810180bb2c739df890a36cfa29da1914eb.tar.gz linux-6a5536810180bb2c739df890a36cfa29da1914eb.tar.bz2 linux-6a5536810180bb2c739df890a36cfa29da1914eb.zip | |
ip6_gre: Do not allow segmentation offloads GRE_CSUM is enabled with FOU/GUE
This patch addresses the same issue we had for IPv4 where enabling GRE with
an inner checksum cannot be supported with FOU/GUE due to the fact that
they will jump past the GRE header at it is treated like a tunnel header.
Signed-off-by: Alexander Duyck <aduyck@mirantis.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv6/ip6_gre.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c index 6fb1b89d0178..af503f518278 100644 --- a/net/ipv6/ip6_gre.c +++ b/net/ipv6/ip6_gre.c @@ -1355,11 +1355,15 @@ static int ip6gre_newlink(struct net *src_net, struct net_device *dev, dev->hw_features |= GRE6_FEATURES; if (!(nt->parms.o_flags & TUNNEL_SEQ)) { - /* TCP segmentation offload is not supported when we - * generate output sequences. + /* TCP offload with GRE SEQ is not supported, nor + * can we support 2 levels of outer headers requiring + * an update. */ - dev->features |= NETIF_F_GSO_SOFTWARE; - dev->hw_features |= NETIF_F_GSO_SOFTWARE; + if (!(nt->parms.o_flags & TUNNEL_CSUM) || + (nt->encap.type == TUNNEL_ENCAP_NONE)) { + dev->features |= NETIF_F_GSO_SOFTWARE; + dev->hw_features |= NETIF_F_GSO_SOFTWARE; + } /* Can use a lockless transmit, unless we generate * output sequences |